In case the maximum reference count to DNS is over.*Refer to the site above for detail information.

The below is reference information for typical syntax errors.

• The maximum reference count to DNS is over.

DNS record including mechanism with reference (such as include:) or modifier cannot be designated more than ten times. In addition the target reference containing further reference is additionally counted. Please note that any change for target reference is should be well taken care of.

• No SPF record referred to is not existed.

When mechanism with reference to one such as include: is used it might end up with syntax error if the target referred to is not existed.